Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813747 | Rack assembly for advancing a winning machine | Volker Knorr, Gerhard Wilken | 1989-03-21 |
| 4773710 | Rack device for advancing a mining machine | Lothar Müller | 1988-09-27 |
| 4516809 | Device for interconnecting two sections of a longwall mining machine track | Gerhard Wilken | 1985-05-14 |
| 4265488 | Track on a conveyor for a mining machine | Herbert Schupphaus | 1981-05-05 |